Python Heroku Deployment

Steps to create a postgres database and deply a Python app to Heroku

Install Postgres dependencies

pip install psycopg2

Install guinicorn locally

pip install gunicorn

Install Heroku CLI

https://devcenter.heroku.com/articles/heroku-cli

Login via CLI

heroku login

Create app

heroku create appname

Create database

heroku addons:create heroku-postgresql:hobby-dev --app appname

or you can create from dashboard and add the details to settings.py

Get URI

heroku config --app appname

# Add to your app

Create Procfile at the root

touch Procfile
# Add this
web: gunicorn project_name.wsgi

or

echo "web: gunicorn mysite.wsgi --log-file -" > Procfile

Create requirements.txt

pip freeze > requirements.txt

Create runtime.txt

touch runtime.txt

# Add this
python-3.9.1

Add your hostname to the list of allowed hosts in settings.py

ALLOWED_HOSTS = ['your_app_name.herokuapp.com']

Add STATIC_ROOT in settings.py

STATIC_URL = '/static/'
# static root
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

Add the static urls in urls.py of the project

from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    # ... the rest of your URLconf goes here ...
] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

Collect Django static assets

python manage.py collectstatic

put the static folder at the root of your project

Deploy with Git

git init
git add . && git commit -m 'Deploy'
heroku git:remote -a appname
git push heroku master

Add table to remote database

heroku run bash
python manage.py migrate
python manage.py createsuperuser

See heroku logs

heroku logs --tail

Visit app

heroku open